21333324340 has 12 divisors (see below), whose sum is σ = 44799981156. Its totient is φ = 8533329728.

The previous prime is 21333324263. The next prime is 21333324359. The reversal of 21333324340 is 4342333312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10998975376 + 10334348964 = 104876^2 + 101658^2 .

It is a super-3 number, since 3×21333324340³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21333324299 and 21333324308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533333089 + ... + 533333128.

It is an arithmetic number, because the mean of its divisors is an integer number (3733331763).

Almost surely, 2^21333324340 is an apocalyptic number.

21333324340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21333324340 is an abundant number, since it is smaller than the sum of its proper divisors (23466656816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21333324340 is a wasteful number, since it uses less digits than its factorization.

21333324340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066666226 (or 1066666224 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 21333324340 its reverse (4342333312), we get a palindrome (25675657652).

The spelling of 21333324340 in words is "twenty-one billion, three hundred thirty-three million, three hundred twenty-four thousand, three hundred forty".